<![CDATA[The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive]]>Archived from the IMDb Discussion Forums — Automobiles and Transportation

Aj_goodfellow — 5 years ago(July 28, 2020 09:16 PM)

The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive.

]]>https://filmglance.com/discuss/topic/25893/the-propeller-doesn-t-seem-like-it-s-spinning-fast-enough-to-generate-so-much-lift-but-i-suppose-it-must-be-impressiveRSS for NodeTue, 12 May 2026 18:53:09 GMTSat, 11 Apr 2026 16:24:50 GMT60<![CDATA[Reply to The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive on Sat, 11 Apr 2026 16:24:52 GMT]]>Dances with Dimwits — 5 years ago(July 28, 2020 11:50 PM)

I can get the same effect if I unfocus my eyes and look at a fan, which I discovered one night while laying on the floor after consuming too much alcohol.

]]>https://filmglance.com/discuss/post/273802https://filmglance.com/discuss/post/273802Sat, 11 Apr 2026 16:24:52 GMT<![CDATA[Reply to The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive on Sat, 11 Apr 2026 16:24:51 GMT]]>Dances with Dimwits — 5 years ago(July 28, 2020 11:11 PM)

It's got to do with the framerate of the sample, basically an optical illusion to video, it wouldn't look like that if you were watching it with your own eyes. I'd go into more detail but you're just as capable of googling **** and pretending to already understand it as I am.

]]>https://filmglance.com/discuss/post/273801https://filmglance.com/discuss/post/273801Sat, 11 Apr 2026 16:24:51 GMT<![CDATA[Reply to The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive on Sat, 11 Apr 2026 16:24:51 GMT]]>None — 5 years ago(July 28, 2020 11:05 PM)

Did you like the work I put into making the trees and bushes sway in the wind?

]]>https://filmglance.com/discuss/post/273800https://filmglance.com/discuss/post/273800Sat, 11 Apr 2026 16:24:51 GMT<![CDATA[Reply to The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive on Sat, 11 Apr 2026 16:24:51 GMT]]>Ye Bastard! — 5 years ago(July 28, 2020 11:01 PM)

More like ****ty CGI, mate! Nice try!

]]>https://filmglance.com/discuss/post/273799https://filmglance.com/discuss/post/273799Sat, 11 Apr 2026 16:24:51 GMT<![CDATA[Reply to The propeller doesn't seem like it's spinning fast enough to generate so much lift but I suppose it must be. Impressive on Sat, 11 Apr 2026 16:24:51 GMT]]>None — 5 years ago(July 28, 2020 09:22 PM)

It’s the iPod Touch version of the Wagon Wheel Effect
You’ve probably noticed that wheels sometimes appear to spin backwards on film or television even when the vehicle they’re attached to is moving forward. This phenomenon is known as the Wagon Wheel Effect, and it’s caused by undersampling and aliasing.
A movie camera samples the light entering its lens 24 times per second. Recalling the Nyquist-Shannon Sampling Theorem, we know that our camera will be unable to properly film any phenomenon which cycles at a frequency greater than 12Hz. Whenever the camera undersamples, there will be an apparent reversal of motion when playing back the film.
https://jackschaedler.github.io/circles-sines-signals/sampling4.html

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